This is a really simple one. The drag-and-drop functionality in Financial databases can be hard to see for some people. See the screenshots below. The box that you drag something into only turns a slightly whiter color when it’s going to accept the drop, which for some people, is very hard to see! I would suggest that if the box is going to accept the drop, it ought to change to a much more contrasting color, like blue.
Also, the addition of a “high contrast” setting in the user settings would be most useful, so this could be turned on and off.